Soul Blazer, Herzog Zwei, and Thunderforce II

Although I bought Monster Hunter Ultimate two weeks ago, there is nothing out for Wii U. Been researching the SHMUP top ten lists again and found Herzong Zwei and Thunderforce II, both top SHMUPs on Sega Genesis.Herzog Zwei is a real time stategy game released in 1989.  Thunder Force II is a launch SHMUP for Sega Genesis.
Soul Blazer is on the top 10 RPG SNES lists. It may be my last SNES game for a while. Those SNES games just double in price after a while.  Last year mainstream SNES games were half as much!  Someone tell the sellers that SNES shouldn't meet Neo Geo games in price.   If all the thrift stores own Chrono Cross and Soul Blazer, then why is this a supply and demand issue.
Soul Blazer got an 8 out of 10 for RPG SNES. Thunderforce II got a 8 out of 10 in Genesis scores.  Herzog Zwei got a 9 out of 10.